Hi! You and I have similar (if not the exact same) hair loss pattern and we are near a similar age. Understand that without Finasteride, which I cannot take either, we will continue to lose our hair.
That said, given your age and pattern (you can see a slight dip in the crown), I think you are probably heading to a Norwood 6. With that, it’s imperative that you preserve grafts and use them wisely.
The surgeon I will be using for my own transplant stated that this type of pattern requires precise donor management and typically recommended less grafts to prevent shock loss (which you should absolutely ask about along with how they plan to manage your donor for future hair loss). The truth is if you do a hair transplant now, you will need two or three in the future. Fortunately you have beard grafts as well, which can be used. Please have them check your donor region to get a sense of how many grafts you have available. If you want a one and done transplant, I suggest you wait until you lose more hair (and even then I think you’ll need a minimum of two transplants).
In my case, which I think you ought to consider given our similarities, the doctor has suggested an initial surgery of 2,000ish grafts next year just for the frontal third (and not to lower the hairline!). You should focus this area first as it frames the face. I anticipate that for my second transplant, likely using a mix of beard hairs, to cover a portion of the crown. From my own rough estimates, I’ll need to budget my donor to have enough donor left to cover any future loss that comes later (possibly 2k grafts to be safe is my guess) and to strengthen those areas. In other words, you and I are probably in this for the long haul. Do keep me updated and best of luck on your journey!